電気学会論文誌E(センサ・マイクロマシン部門誌)
Online ISSN : 1347-5525
Print ISSN : 1341-8939
ISSN-L : 1341-8939
飽和型磁気センサを用いた電流センサの開発
中川 士郎藪崎 勝巳木下 源一郎
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2001 年 121 巻 1 号 p. 39-44

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This paper describes development of an electric current sensor for measuring a large current. A magnetic saturatable detector is used in place of a Hall detector in the conventional current sensor. The sensor is developed with low price and high stability for parameter deviations caused on a temperature variation and such a disturbance. The balanced large current driving circuit which excites a magnetic detector with very low offset voltage and some techniques are proposed as new circuits which detect the inductance changes caused on a magnetic flux. These sensing circuits realize a stable step for a large current.

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